Index: trunk/core/kernel/application.php
===================================================================
diff -u -N -r8005 -r8006
--- trunk/core/kernel/application.php	(.../application.php)	(revision 8005)
+++ trunk/core/kernel/application.php	(.../application.php)	(revision 8006)
@@ -2378,8 +2378,12 @@
 		}
 	}
 
-	function TimeZoneAdjustment($time_zone=null)
+	function TimeZoneAdjustment($time_zone = null)
 	{
+		if ($time_zone == 'GMT') {
+			return (-1) * adodb_date('Z');
+		}
+		
 		$target_zone = isset($time_zone) ? $time_zone : $this->ConfigValue('Config_Site_Time');
 		return 3600 * ($target_zone - $this->ConfigValue('Config_Server_Time'));
 	}